Compilare: user.cpp: In function ‘char nextch()’: user.cpp:16:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fin); ^ user.cpp: In function ‘int main()’: user.cpp:211:38: warning: ‘alfa’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(y!=(val[heap[x][0]]&((1<<14)-1))){ ^